Maria interviews retired Vanguard founder Jack Bogle on investing for retirement and the changes in the industry since 1974. Maria Bartiromo’s Wall Street, June 8, 2018 Jack Bogle, the founder of Vanguard, says: 1. “Cost is everything.” 2. “Simplify everything. The answer is to buy and hold the stock market very well exemplified by the (S&P) 500 AND HOLD IT FOREVER.”